Tumpak Sewu Waterfalls Tumpak Sewu, also known as Coban Sewu, is a breathtaking tiered waterfall located on the border of Pronojiwo District in Lumajang Regency and Ampelgading District in Malang Regency, East Java, Indonesia. Towering above this natural wonder is Mount Semeru, an active volcano and the highest mountain on the island of Java. The Glidik River, which originates from the slopes of...